Projection type video display

Abstract

A projection type video display capable of reducing components in number, and attempting to improve a cooling efficiency and a silencing of the video display is provided. Three cooling fans are provided on a plate member arranged within a chassis of the video display of a liquid crystal projector. The plate member is arranged in such a manner as to be spaced apart from a bottom plate of a chassis of the video display in order to form a single external-air introducing duct. Double-bottomed structure is formed by the plate member, and the plate member is used as a bottom for arranging components. Each cooling fan sucks external air from the single external-air introducing duct, and blows the external air from a blowing duct to an object to be cooled (a light source, a liquid crystal display, and others).

1. A projection type video display that modulates light emitted from a light source by a video display panel, and projects this modulated light by a projection lens, comprising a plurality of cooling fans, a plate member arranged in such a manner as to be spaced apart from a bottom portion of a chassis of the video display so as to from double-bottomed structure in order to form a single external-air introducing duct, wherein a plurality of apertures are formed in the bottom portion, and each cooling fan is configured in such a manner as to suck external air from said single external-air introducing duct via the apertures being located below the plate member. 
   
   
     2. A projection type video display according to  claim 1 , configured in such a manner that components other than the cooling fan, too, are arranged on said plate member. 
   
   
     3. A projection type video display according to  claim 1 , configured in such a manner that a wall of the chassis of the video display rising from the bottom portion of chassis of the video display forms said external-air introducing duct. 
   
   
     4. A projection type video display according to  claim 3 , wherein a side-surface wall portion, and a rear-surface wall portion of the chassis of the video display are utilized as said wall of the chassis. 
   
   
     5. A projection type video display according to  claim 1 , wherein said external-air introducing duct exists in an area across a far side seen from a location in which a projection lens is arranged and a rear of the video display. 
   
   
     6. A projection type video display according to  claim 5 , wherein a bottom portion of a chassis of a video display protrudes downwardly in the area across a far side seen from a location in which a projection lens is arranged and a rear of the video display, and said external-air introducing duct exists within this protruding bottom portion. 
   
   
     7. A projection type video display according to  claim 1 , wherein said external-air introducing duct is formed in such a manner as to avoid an area in which an AC plug is arranged. 
   
   
     8. A projection type video display according to  claim 1 , having a flowing duct for blowing to an object to be cooled air blown from each fan, and said blowing duct being formed to be integrated with said plate member.